4 Rev. 2
Introduction
Model 1700 Liquid Level Instrument
1.1.5 Intuitive Human-Interface Design
The Model 1700 instrument is designed to simplify the touch-screen based
user interface. All functions were analyzed and subsequently programmed
so that the most commonly used functions are addressed with the least
number of keystrokes. The menus are presented in a logical fashion so that
the operation of the Model 1700 is intuitive to the user.
1.1.6 Measurement Flexibility
Set points can be assigned to control two dry-contact relay outputs. The
make or break function of each relay can be set independently. A solid-
state relay allows mains power to be switched according to set points to
operate a solenoid-operated valve or other load.
1.1.7 Real Time Clock
The Model 1700 Instrument incorporates a real time clock with automatic
daylight savings time adjustment (if desired).
1.1.8 Valve Control Output
The Model 1700 Instrument has a switched 2 ampere at mains voltage
output for energizing a solenoid operated flow valve or other loads. This
outputs is controlled by a zero-crossing solid state relay.
The fill start is triggered by a level reading. The fill is stopped by reaching
a user-set level, or exceeding a maximum fill time.
1.1.9 Analog Outputs
The Model 1700 Instrument has two analog outputs, a 0-10 V
DC
voltage
output and a 4-20 mA
DC
current loop output. The 4-20 mA
DC
loop output
has 1500 V
PK
circuit isolation. The outputs can be used simultaneously.
1.1.10 Signal Relays
The Model 1700 Instrument has two signal relays that change state based
on a measured input. The set points of these relays are user-selectable as
is their function, alarm on level above or below set point.
1.1.11 Connectivity
The Model 1700 Instrument has a 10Base-T Ethernet connection as well
as a 115,200 baud RS-232 port for connecting to other equipment. The
instrument communicates with a SCPI-based command set. The command
set is 100% backward compatible with the AMI Model 135, 136, 185, and
186 instruments when configured as a single channel instrument. When
configured as a dual channel instrument, additional commands are
incorporated into the command set.
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